64 → 328 slots in 12 levels
| Level | Slots | Cost | Total |
|---|---|---|---|
| 1 | 64 | Available from the start. | |
| 2 | 88+24 | 5,000 | 5,000 |
| 3 | 112+24 | 10,000 | 15,000 |
| 4 | 136+24 | 15,000 | 30,000 |
| 5 | 160+24 | 25,000 | 55,000 |
| 6 | 184+24 | 50,000 | 105,000 |
| 7 | 208+24 | 80,000 | 185,000 |
| 8 | 232+24 | 100,000 | 285,000 |
| 9 | 256+24 | 150,000 | 435,000 |
| 10 | 280+24 | 300,000 | 735,000 |
| 11 | 304+24 | 750,000 | 1,485,000 |
| 12 | 328+24 | 1,500,000 | 2,985,000 |